Fertilisers & Additives

Houseplant fertilisers include liquid feeds, powder formulas, organic products and specialist nutrients for soil, coco, hydro and semi-hydro growing. CalMag, rooting, microbial, enzyme, silicon and pH products address specific nutrient, root and water-quality needs alongside complete plant nutrition.

Quick buying checks:

Purpose: Fertilizers replace nutrients that plants use, lose through watering or no longer get from ageing substrate.
Starting dose: For complete liquid feeds indoors, 25–50% of the label dose is often a safer first step.
Best timing: Feed when plants are producing active root or leaf growth, not when growth has clearly slowed.
Application: Apply liquid feeds to evenly moist substrate unless the product label says otherwise.
Semi-hydro: Inert media add no nutrition, so nutrients need to come from the water or reservoir routine.

Easy plant foodSimple feeding for indoor plants in regular potting mix.

Organic feedingOrganic liquid feeds and soil-friendly plant support.

Semi-hydro & LECAMineral nutrients for inert media, reservoirs and LECA-style setups.

Coco nutrientsA+B feeds and support products for coco-grown houseplants.

Rooting & recoveryRoot stimulators, rooting aids and repotting support.

pH, CalMag & waterWater correction, mineral balance and pH adjustment tools.

Additives & enzymesEnzymes, silicon, vitamins and targeted plant-support products.

Biobizz Acti Vera

From €8,00

Biobizz Alg A Mic

From €6,25

Biobizz Bio Grow

From €4,00

Biobizz Bio Heaven

From €20,75

Biobizz Calmag

From €5,50

Biobizz Fish Mix

From €3,75

Biobizz Microbes

€67,75

Biobizz Root Juice

From €14,25

BIOCANNA Bio Rhizotonic

From €15,25

BIOCANNA Bio Vega

From €14,25

Organic Plant Food – 50ml main product photo on white background.

Botanopia Complete Organic Plant Food

€11,25

CANNA Aqua Vega A+B

From €17,00

CANNA CalMag Agent

From €14,25

CANNA Cannazym

From €9,00

CANNA Coco A+B

From €15,50

CANNA Hydro Vega A+B

From €18,25

CANNA pH Plus 5%

€9,75

CANNA pH- Growth 17% Pro

€9,25

CANNA Rhizotonic

From €16,00

CANNA Start

From €11,75

CANNA Terra Vega

From €12,00

HESI Bio Grow

From €12,00

HESI CalMag

From €7,25

HESI Coco

From €11,75

HESI Hesilicio

From €6,00

HESI HousePlant Elixir

From €11,50

HESI Hydro Growth

From €11,25

HESI OrchiVit

From €9,50

HESI PowerZyme

From €10,75

HESI Root Complex

From €19,25

HESI SuperVit

From €11,75

HESI TNT Complex

From €10,75

Plagron Alga Grow

From €7,75

Plagron CalMag Pro

From €12,00

Plagron Cocos A+B

From €15,25

Plagron Hydro A+B

From €16,50

Plagron Hydro Roots

From €6,50

Plagron Lemon Kick

From €10,50

Plagron NextGen Rooting Gel

€9,50

Plagron pH Min

From €11,50

Plagron pH Plus

From €8,75

Plagron Power Roots

From €20,75

Plagron Pure Zym

From €11,00

Plagron Seedbooster Plus

€21,00

Plagron Silic Rock

From €8,50

Plagron Terra Grow

From €10,75

Plagron Vita Race

From €10,75

Pokon Bio Plant Cure Capsules

€11,25

Person pouring liquid fertilizer from a brown bottle into a watering can on a wooden table with plants and gardening tools.

Choosing fertiliser by growing system

Houseplant fertilisers differ in nutrient balance, concentration, delivery method and growing-system compatibility. Liquid feeds suit flexible dosing, slow-release products provide gradual nutrition and specialist formulas support orchids, aroids or mineral systems. The right choice starts with the medium and the plant’s active growth.

Concentration and dosing style

Highly concentrated products offer many applications from a small bottle and require precise measuring. Ready-to-use or lightly concentrated feeds simplify routine care. Clear dosing instructions, bottle size and application frequency help compare value across products.

Plants in active growth use nutrients steadily, while slow seasonal growth calls for a lighter schedule. Nutrient balance, dilution and timing determine effective houseplant fertilising.

Soil and mineral growing systems

Organic-rich mixes hold and release nutrients differently from pumice, pon or expanded clay. Semi-hydro setups benefit from formulas designed for mineral media and regular reservoir care. Fertilising in semi-hydro focuses on concentration, flushing and steady supply.

Bottle format also matters in regular use. Measuring caps, pumps and clear labels make repeat dosing easier. A product that matches the growing system supports a consistent routine across the plants that use it. The repotting guide helps coordinate feeding changes with fresh substrate and renewed root growth.

Frequently Asked Questions About Fertilizers

Which fertilizer should I choose for my houseplants?

Start with the growing method. For plants in regular potting mix, a complete houseplant fertilizer or organic plant food is usually the easiest choice. For coco, LECA or semi-hydro, choose a feed made for that setup, because the substrate affects how nutrients and water behave around the roots.

Can I use regular plant food in LECA or semi-hydro?

For LECA, pon and other inert semi-hydro setups, a hydro or semi-hydro nutrient is usually the cleaner choice. Inert media do not add nutrition on their own, so the feed has to supply the plant through the water or reservoir. Some simple products can work for light use, but pH, EC and mineral balance matter more than in soil.

What is the difference between fertilizer and additives?

A complete fertilizer provides the main nutrients a plant uses for growth. Additives have narrower jobs, such as root support, enzyme activity, silicon, CalMag or pH correction. They can be helpful in the right setup, but most additives are not meant to replace a suitable base feed.

How often should I fertilize indoor plants?

Feed when the plant is actively producing roots or leaves and the growing conditions can support that growth. Indoors, starting below the full label dose is often safer, especially for small pots, lower light or sensitive plants. Increase only when new growth looks steady and the substrate drains properly.

Should I fertilize a stressed or struggling plant?

No. Fix the real problem first, whether that is poor light, root trouble, temperature stress, pest pressure, or bad watering. Fertilizer supports growth; it does not rescue a plant that is already in trouble.

Worth reading:

Close-up of hands measuring liquid houseplant fertilizer

Which Fertilizer Works Best for Your Houseplants?

Hands fertilizing indoor plants with bottles, tools and containers on a table

Beginner’s Guide to Fertilizing Houseplants

Epipremnum aureum cutting, LECA, self-watering pot, water indicator and fertilizer bottle

How to Fertilize Houseplants in Semi-Hydroponics (LECA, Pon & More)

Experience you can count on

More than 20,000 customers, rated 4.6 out of 5 stars.

Quality first

Plants are hand-selected and checked before shipping.

Reliable shipping

Safe packaging and tracked shipping from DE and NL.

Small business

Support a small, independent, women-led family business.

Row of various potted baby plants (starter plants) on a white background

Shop Baby Plants ➜

Our Customers

rate us with 4.6 out of 5 Stars

★★★★★

Die Pflanzen waren prima verpackt und ein heatpack war im Paket enthalten. Die Lieferzeit hat 2 bis 3 Tagen gedauert, was aus meiner Sicht wirklich gut ist. Alle drei Pflanzen haben die Lieferung gut überstanden. Ich habe mich auf Hoyas spezialisiert und habe schon die nächsten Pflanzen meiner Wunschliste auf der Website gefunden. Daher wird die nächste Bestellung nicht lange auf sich warten lassen.

Marion

★★★★★

The plants are carefully packaged and arrive in great conditions (I’m based in Spain) and they’re always there to help in any way they can with your purchase.I have and will always recommend Foliage Factory to every friend I can. I’m not only satisfied with their plants and prices, but their customer service is exceptional.

José

★★★★☆

Very healthy and well packed plant. Unfortunately there was one plant that ordered couldn’t be delivered as it was out of stock hence 1 star less.

Sam

★★★★☆

Die Sendung kam leider in keinem guten Zustand bei mir an, kann passieren. Habe mich darauf hin sofort an Foliage Factory gewandt und habe selten einen so guten, schnellen, freundlichen und kulanten Kundendienst erlebt.

Frauke

★★★★★

Everything arrived in good condition and very well packed - it wasn't easy with a fragile plant and a heavy bag of substrate. I recommend it!

Lia

★★★★★

Bester online-Pflanzenhandel den ich kenne (habe davor 4 andere ausprobiert). Eine teure Pflanze wurde beim Transport beschädigt und mir ersetzt. Der Kontakt dabei war auch sehr nett (danke Jan) und hat mir gut geholfen. Die anderen Pflanzen sind in einem sehr guten Zustand, keine Schädlinge, super Bewurzelung. Nur zu empfehlen! :)

C L

★★★★★

Super Service, Gute Auswahl, Preise sind fair. Eine Pflanze kam kaputt an, hab sofort Ersatz bekommen. Danke an den unkomplizierten (und blitzschnellen) Kundenservice!!

Sarah

★★★★★

Envoie très rapide (2 jours), plantes parfaitement emballées et super offres ! Je suis une habituelle j'ai passé 6 ou 7 commandes et je n'en peut être plus satisfaite du service client et de la qualité et variété des plantes offertes

Iris

★★★★★

The plants have arrived in perfect condition, the roots and the foliage so so healthy! I had problem with 1 plant out of 16 and they have responded to my email almost instantly and the issue was resolved straight away. I'm really impressed and satisfied, definitely getting more plants from them again!

Patricija

★★★★★

I received perfectly heathy and absolutely beautiful plants, even bigger than expected. The delivery within Europe was really fast. I think Foliage Factory has one of the best plant web shops in the internet. It‘s just great to get so much informations about the plants. I will definitely order again :)

Walkerova